When to start a blanket?

I am currently (estimated) almost 6 weeks along and I have my first appointment scheduled but I was wondering if it was too early to start making a baby blanket. I crochet and I have this beautiful yarn that would make the perfect baby blanket, but I’m not sure if starting it now is a good idea or if that would jinx this pregnancy. Google brought me no results for this question 😂 anybody have any thoughts on this one?